Advantages And Disadvantages Of Gate Valves
Gate Valve refers to a valve whose closing part (gate) moves in the vertical direction along the axis of the channel. It is mainly used to cut off the medium on the pipeline, that is, it is fully open or fully closed.
Generally, gate valves cannot be used to adjust flow. It can be used for low temperature and pressure or high temperature and high pressure, and can be used according to different materials of the valve. However, gate valves are generally not used in pipelines that transport media such as mud.
Advantages: ① Small fluid resistance;
② Small torque required for opening and closing;
③ Can be used on ring network pipelines where the medium flows in two directions, that is, the flow direction of the medium is not restricted;
④ When fully open, the sealing surface is less eroded by the working medium than the stop valve;
⑤ The shape and structure are relatively simple, and the manufacturing process is better; ⑥ The structure length is relatively short.
Disadvantages: ① The overall dimensions and opening height are large, and the required installation space is also large;
② During the opening and closing process, the sealing surface is relatively rubbed, the wear is large, and it is easy to cause scratches even at high temperatures;
③ Generally, gate valves have two sealing surfaces, which adds some difficulties to processing, grinding and maintenance; ④ The opening and closing time is long.
